Forewing smooth, unspeckled green, the markings black and prominent: the claviform (club-shaped) and orbicular (round) stigmata coalescing to form a blotch; ab.

viridis Tutt, rich green, without black or grey dusting; ab.

flavescens Tutt, like the type, but with the green changed to yellow, even in bred specimens; ab.

pallida Tutt, with typical markings on a whitish-grey ground colour; and ab.

obscura Tutt, dull brownish grey, with the markings obscured and without any trace of green; all these forms are found on the coast of Kent and at Queenstown in Ireland.